Quality 1 is for homogeneous compact bone, and Quality 2 describes a thick layer of compact bone surrounding a core of dense trabecular bone.
This classification, widely used in modern implant dentistry, is essentially qualitative and defines bone quality based on the relationship between the compact cortical and the trabecular bones, as follows. Lekholm and Zarb listed four types of bone quality found in the anterior regions of the jawbone. The external and internal architecture of bone controls virtually every facet of the practice of implant dentistry from implant design selection, surgical approach, healing time, type of future prosthetic reconstruction etc. The external architecture of the dentate or edentulous alveolar bone and its volume are primarily evaluated during treatment planning for dental implants. Poor bone quality and quantity are considered as a risk factor for biological complications of the implant, associated with lack of primary stability and impaired healing / osseointegration, that can lead to early implant loss. The early and long-term success of dental implants depends largely on the alveolar bone quantity and quality during implant placement. Dental implants are the most popular and predictable modern solution for missing teeth.
